I just might want to note that your statement of graviton being unit of measurement is not quite correct if regarded as statement about nature. What you might have wanted to say or state is statement about our method - that notion of graviton is a means to measure certain physical property...
I guess the question here is about the correct way of talking about physical properties.
In the age of alchemy they didn't refer to formulas of chemical reacions, instead is was all about the reaction and how it appears to us. When we use formulas, we say that what appears as chemical...
Allright. If nothing then can escape black hole, how come it is still considered part of our universe. My thought is like this: if not even light with its speed (of light in vacuum) can't get pass event horizon of black hole, how come gravity is still influencing objects outside it's horizon...
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Exactly. I think I should note here that actually there is no such thing as empty space. I found my statement on observed cosmic microwave background radiation (CMBR) and continuous particle - antiparticle birth and annihilation throughout all observable universe. If we are to speak of...